When You Are Exposed to Bright Light, a Reflex Is

question 6

Multiple Choice

When you are exposed to bright light, a reflex is initiated and your iris constricts to decrease pupil size. Which structure serves as a receptor in this system?

• A) The retina
• B) The iris
• C) The eyelid
• D) The brain's visual cortex

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Definitions:

Milliliter

A unit of volume in the metric system, equal to one-thousandth of a liter, commonly used to measure liquids.

Discontinue

The act of ending or stopping something, such as medication or treatment.

NPO

An abbreviation for "nil per os", a medical instruction meaning nothing by mouth, used to ensure a patient's stomach is empty for a procedure or test.

Mcg

Microgram, a unit of mass equal to one millionth of a gram, often used in medicine to specify dosages of drugs and vitamins.